package com.coffee.service.impl;

import com.coffee.constant.MessageConstant;
import com.coffee.constant.StatusConstant;
import com.coffee.context.BaseContext;
import com.coffee.dto.CategoryDTO;
import com.coffee.dto.CategoryPageQueryDTO;
import com.coffee.entity.Category;
import com.coffee.exception.DeletionNotAllowedException;
import com.coffee.mapper.CategoryMapper;
import com.coffee.mapper.DishMapper;
import com.coffee.mapper.SetmealMapper;
import com.coffee.result.PageResult;
import com.coffee.service.CategoryService;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增分类
     * @param categoryDTO
     */
    public void save(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);//默认 禁用
        //category.setCreateTime(LocalDateTime.now());
        //category.setUpdateTime(LocalDateTime.now());
        //category.setCreateUser(BaseContext.getCurrentId());
        //category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.insert(category);
    }

    /**
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page=categoryMapper.pageQuery(categoryPageQueryDTO);
        long total=page.getTotal();
        List<Category> records=page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 启用禁用分类
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, long id) {
        Category category=new Category();
        category.setId(id);
        category.setStatus(status);
        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> getByType(Integer type) {

        List<Category> category=categoryMapper.getByType(type);
        return category;
    }

    /**
     * 更新分类信息
     * @param categoryDTO
     */
    public void update(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //category.setUpdateUser(BaseContext.getCurrentId());
        //category.setUpdateTime(LocalDateTime.now());
        categoryMapper.update(category);
    }

    /**
     * 删除分类
     * @param id
     */
    public void deleteById(long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }
}
